Possible Storylines:
* The Treasure Hunters: Two grizzled veterans, Wayne (a former army officer) and Marvin (a cynical ex-con), stumble upon a map leading to buried treasure on a remote island. They team up reluctantly, battling both the elements and rival treasure hunters to claim the riches.
* The Escapees: Two escaped convicts (Wayne and Marvin) find refuge on a deserted island. One (Wayne) seeks redemption, while the other (Marvin) is consumed by his past. Their clash of personalities leads to a showdown and a surprising revelation about their shared history.
* The Lost Colony: Wayne and Marvin, survivors of a shipwreck, discover a small community of descendants of a lost colony on the island. They face a moral dilemma as they are drawn into a conflict between the colonists and a band of ruthless mercenaries seeking to exploit the island's resources.
Themes and Styles:
* Western Tropes: The film could retain classic Western themes of honor, justice, and the struggle for survival. The island setting could be a metaphor for the untamed wilderness of the American West.
* Action Adventure: With exciting chase scenes, thrilling combat, and stunning island scenery, the film could blend action and adventure to create a captivating experience.
* Buddy Cop/Odd Couple: The contrasting personalities of John Wayne and Lee Marvin could create a dynamic duo. The film could explore their rivalry, their begrudging respect for each other, and their eventual bond forged through shared hardship.
Title Ideas:
* Island of Shadows
* The Sunken Treasure
* The Lost Colony
* Two Men, One Island
* Redemption on the Reef
Let me know if you want to explore any of these ideas in more detail. I can help you flesh out the story, characters, and setting!